added test for plateaus with holes and tolerance
added test for plateaus with holes and tolerance

hmeine/vigra,dstoe/vigra,cha007/vigra,psteinb/vigra,capturePointer/vigra,stuarteberg/vigra,hmeine/vigra,hmeine/vigra,dagophil/vigra,DaveRichmond-/vigra,hmeine/vigra,xiwei-zhang/vigra,DaveRichmond-/vigra,ThomasWalter/vigra,psteinb/vigra,funkey/vigra,dstoe/vigra,timoMa/vigra,psteinb/vigra,cbecker/vigra,cha007/vigra,xiwei-zhang/vigra,xiwei-zhang/vigra,capturePointer/vigra,dagophil/vigra,mmuellner/vigra,dstoe/vigra,martinsch/vigra,martinsch/vigra,timoMa/vigra,kod3r/vigra,xiwei-zhang/vigra,martinsch/vigra,timoMa/vigra,psteinb/vigra,kod3r/vigra,funkey/vigra,dagophil/vigra,capturePointer/vigra,stuarteberg/vigra,stuarteberg/vigra,cha007/vigra,dstoe/vigra,cha007/vigra,DaveRichmond-/vigra,psteinb/vigra,mmuellner/vigra,kod3r/vigra,ThomasWalter/vigra,capturePointer/vigra,DaveRichmond-/vigra,psteinb/vigra,cbecker/vigra,dstoe/vigra,DaveRichmond-/vigra,cbecker/vigra,timoMa/vigra,dstoe/vigra,dagophil/vigra,stuarteberg/vigra,kod3r/vigra,martinsch/vigra,mmuellner/vigra,dagophil/vigra,xiwei-zhang/vigra,mmuellner/vigra,mmuellner/vigra,DaveRichmond-/vigra,cha007/vigra,capturePointer/vigra,kod3r/vigra,dagophil/vigra,funkey/vigra,ThomasWalter/vigra,hmeine/vigra,cbecker/vigra,psteinb/vigra,ThomasWalter/vigra,capturePointer/vigra,martinsch/vigra,funkey/vigra,mmuellner/vigra,funkey/vigra,dagophil/vigra,martinsch/vigra,xiwei-zhang/vigra,hmeine/vigra,ThomasWalter/vigra,DaveRichmond-/vigra,stuarteberg/vigra,mmuellner/vigra,kod3r/vigra,ThomasWalter/vigra,ThomasWalter/vigra,timoMa/vigra,hmeine/vigra,timoMa/vigra,stuarteberg/vigra,dstoe/vigra,funkey/vigra,cha007/vigra,cha007/vigra,timoMa/vigra,capturePointer/vigra,kod3r/vigra,cbecker/vigra,cbecker/vigra,funkey/vigra,xiwei-zhang/vigra,stuarteberg/vigra